These dramatic cola-colored falls have appeared in a poem by Henry Wadsworth Longfellow and a song by Sufjan Stevens.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Two flush headstones mark the only known graves to be embedded in an airport runway.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Built by the patriotic residents of Boonsboro in a single day.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A fitting attraction for the corn capital of the world.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Deadly airliner crash preserved for those willing to climb and pay respects.

The World's Largest Bull.

The park is home to the United States's only still-operating Dutch windmill.

What was once the largest NFL stadium.

A mysterious castle built as a monument to lost love.

An icon among Florida's pre-Disney tourist attractions, just west of Orlando.

A building so large that it has its own weather.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The world's largest fully steerable radio telescope.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

A historic coal mine that doubles as a museum and tourist attraction.

America's post-nuclear-attack chambers of Congress.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.